Door-operating mechanism



7 P. R. FORMAN.

DOOR OPERATING MECHANISHL I Filed Au 25 ,191? a shuts-shut 1 Dec. 1 1' 1923.

27 jlzvenjvi r P. R. FORMAN noon OPERATING MECHANISM Filed Aug. 23 1917 s Shets-Sheat 2 Dec. 11 1923. 1,476,703

P. R. FORMAN DOOR OPERATING MECHANISM Filed Aug. 25 1917 3 Sheets-Shut 5 Patented Dec. 11, 1923.

UNITEE STATES were PATENT orr icn.

PAR-IS E. FGRM AN, OF CHICAGO, ILLINOIS, ASSIGNOR TO NATIONAL PNEUMATIC COIL IANY, OF NEW YORK, N. Y., A CORPORATION OF WEST VIRGINIA.

DOOR-OPERATING mncnamsiu.

Application filed August 23, 1917.

T all whom it may concem:

Be it known that I, PARIS R. FORMAN, a citizen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have made a certain new and useful Invention in Door-Operating Mech anism, of which the following is a specification.

This invention relates to door operating mechanism, and particularly to mechanism of the fluid pressure operated type.

The object of the invention is to provide a door operating mechanism of simple structure which is efiicient in operation. and economical of manufacture, which may be readily applied without additional equipment to the present manually operated doors, such as are used on street cars, trains, sub way or elevated.

Further objects of the invention will appear more fully hereinafter.

The invention consists substantially in the construction, combination, location and relative arrangement of parts all as will be more fully hereinafter set forth, as shownby the accompanying drawings and finally pointed out in the appended claim.

Referring to the drawing;

Fig. 1 is a view in elevation and partly in section of the platform and a portion of the body portion of a car.

Fig. 2 is a top plan view of the door operating mechanism shown in Fig. 1.

Fig. 3 is a sectional view in elevation thereof.

Fig. 4 is a sectional View taken on the line 4-4, Fig. 3 and looking in the direc- 'tion of the arrows.

Fig. 5 is a top plan view of Fig. 1 with the roof of the car removed.

Fig. 6 is a horizontal sectional view of a modified form of motor employed in accordance with my invention.

Fig. 7 is a view in front elevation of the same.

Fig. 8 is a vertical sectional view of a still further modified construction of motor employed in accordance with my invention.

Fig. 9 is a sectional view taken on the line 9 9 Fig. 8 and looking in the direc tion of the arrows.

Fig. 10 is a similar view taken on the line 10-10, Fig. 8 and looking in the direction of the arrows.

Fig. 11 shows another form of arrange Serial No. 187,903.

ment of parts which will accomplish the purposes of my invention.

Fig. 12 is a similar view of a modified structure of motor employed in accordance with my invention.

Fig. 13 is a top plan view of the same slightly enlarged. 5 i

Fig. 14.- is a vertical sectional view of the same.

Figs. 15 and 16 are diagrammatic views showing the pneumatic control of the motors.

The same part is designated by the same reference numeral wherever it occurs throughout the several views.

It is among the special purposes of my present invention to provide a simple and efficient type of construction of motor which alone can be added to the present manually operated door operating mechanism to thereby convert the same from the manual control to the pneumatic control. The advantage of this arrangement is apparent in that where the doors at present are opened and closed by manual exertion, in the arrangement of my invention the only manual exertion required is to shift a valve which controls the pneumatic motor and which in turn opens and closes the doors. At the present time, where it is contemplated to employ women conductors for various reasons, and where the actual manual labor in controlling. the doors must be minimized, my present invention is especially adapted. In a great many types of structures now in use, the conductors station is in the form of a barrier which divides the body of the car into separate passageways to thereby effectively form a fare prepayment station and divide the incoming from the outgoing passengers. In this type of car. it is customary tomount the door control mechanism at the conductors control station and my present invention is especially adapted to cars of this type. While the particular type of door operating cpnnections for actually operating the door from the control station forms no part of my present invention, I haveshown what has now become standard in the art, as one form that may be readily em loyed in connection therewith, namely, t e type of operatin connections shown in U. S. Patent to owntree 1,067,787, atented July 15th, 1913, which consists su stantially in the connections 1 FIE ill

secures the other end of the segment gear 46 to the pistonddas shown. The parts are shown, as will be hereinafter described, in the position which indicates that the doors of the car are closed. To open the door fluid pressure is admitted behind the piston to larger diameter, namely 43, thereby rocking the segment gear 46 about its pivotal connection 47 thus causing the piston 44 to travel downwardly in its cylinder 42 and simultaneously rotating the bevel gear 45 of the shaft 6, thus securing the operating movement of the shaft 5, to open the door. It is apparent that the reverse operation will rotate the shaft 6 in the opposite direction and thus secure the closing movement of the door. I have shown this type of motor in Figs. 12 and 13 as provided with the hand grab 31. It is obvious however, that I am not to be limited to this detail. In Figs. 6 and 7, I show what I will term a horizontal type of motor which may be emplo ed in accordance with my invention. have shown this construction being of. the differential cylinder type comprising a cylinder 50 of large diameter and a cylinder 51 of' small diameter in which parts res ctively are located the pistons 52 and 53, W ich pistons are connected together by means of the rack bar 54:, which rack bar meshes with and rotates a gear wheel 55 carried by the shaft 6. The control handle 30 operates the valve which controls the admission and exhaust of the fluid pressure to and from the motor. I have likewise shown this type of motor provided with a hand grab or rail 31. It is apparent that all moving parts are completely enclosed within the standard so that in effect the motor itself becomes a portion of the hand rail or grab. As shown in Fig. 11, a motor of this type of construction may be located on the riser 9 leadin to the car floor 10 and clamped thereto y suitable clamps 60. This particular location of the motor, however, forms no partof my present invention.

In Figs. 15, 16 and 17, I show the fluid pressure connections for controlling the supply of fluid pressure to and from the motor, and while I have shown it as applied to the type of motor shown in Figs. 6 and 7, it is apparent that the same system of control may be emplo ed for all of the motors herein describe The piston 52 of larger diameter, and the piston 53 of smaller diameter, is in each case employed. The

, valve indicated at which controls the motor is provided with a connection 71 to the source of fluid pressure and a connection 72 to open air or exhaust. The

valve is connected by line 73 to the end of the cylinder of large diameter and the end of the cylinder of small diameter behind the piston 53 continuously in connection with the source of fluid pressure through the pipe line 71. The valve is in communication with the source of pressure through port 74. The pipe line 73 'communicates with the valve through port 75. The exhaust 72 communicates with the valve through port 76. An additional port 7 communicates by means of pipe line 78 'to the cylinder of larger diameter at a point mid-length therein.

lhese parts are fixed in the valve seat adjacent the rotatable portion of the valve. The rotatable portion of the valve 70 is provided with passages 80 and 81 therein so that when properly positioned the passage 80 establishes communication between the port 74 and port 75, as shown in Fig. 15, and likewise will establish communication between the port 77 and through restricted opening 83 with port 75 in its other extreme position'as shown in Fig. 16. From this, it isseen, that fluid pressure is at all times admitted behind the piston 53 of smaller diameter so that when the doors are all closed and the ports are in a normal position as shown in Fig. 15. the pistons are in their extreme left position, as shown in said figure. To

open the door, thevalveiis moved on its seat to the position shown in Fig. 15,

whereb fluid pressure is admitted from source 1 to port 74, to passage of the rotary valve, to port 75, line 7 3 to the motor,

and behind the piston 52. Thus thepressure behind each of the pistons is equalized but piston 52, being of larger diameter than the piston 53, the pistons move to the right against the pressure which at all times is maintained against the smaller piston 53, and the doors are thus in their open position and the motor is in the position shown in Fig. 16. To close the doors, it is merely necessary to exhaust the cylinder of piston 52 and to effect this condition the valve assumes the position shown in Fig. 18, whereby the rt 74 is severed from communication with the port 7 5, as shown, and tge port 7 7 is placed in communication with t e haust 72. Thus there is a free flow of fluid pressure behind the piston 52 through the line 78, ports 77 and 7 6, to exhaust 72, until the travel of the piston 52 to the left covers the o ning of the pipe line 78 into the cylind ie i of the piston 52. There is, however, communication from the cylinder of piston 52 through pipe line 73, port 75, restricted openings 83 to'the exhaust 72, which allows the pistons 52 and 53 to move to their extreme left position and at the same time securin a proper cushioning action for the last 0 osing movementsof'the top to thereby prevent slamming. Many other details and arrangements embodying the principles of my invention will occur to those skilled in the art without departing from the scope of my invention, as defined in the claim.

port 76 and consequently'with the exrec are

lit;

Therefore, I wish it to be understood that my invention is not to be limited to the de-.

tails of construction set forth hereinbefore. Having now set forth the objects and nature of my invention and having shown and described various embodiments thereof,

- own invention and desire to what I claim as new and useful and of my secure by Let ters Patent is? V In a car, the combination with a platform,

said connections extending Vertically from said platform a hollow standard for enclosing said shaft, a gear located at the end of said shaft and secured thereto to rotate therewith, a rack bar meshing with said gear, said rack forming a connecting rod between the pistons of a fluid pressure actuated motor said motor being supported by said standard, and means forcontrolling said motor.

In testimony whereof I have hereunto set my hand on this 16th day of August,

A. D. 1917. v

- PARIS R. FORMAN. 

